RNA BINDING PROTEIN / Reverse transcriptase / ribonucleoprotein / telomerase / telomere / DNA BINDING PROTEIN
機能・相同性
機能・相同性情報
: / positive regulation of DNA strand elongation / positive regulation of telomeric D-loop disassembly / G-rich single-stranded DNA binding / telomere assembly / positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation ...: / positive regulation of DNA strand elongation / positive regulation of telomeric D-loop disassembly / G-rich single-stranded DNA binding / telomere assembly / positive regulation of hair cycle / template-free RNA nucleotidyltransferase / positive regulation of transdifferentiation / TERT-RMRP complex / DNA strand elongation / RNA-directed RNA polymerase complex / positive regulation of protein localization to nucleolus / siRNA transcription / 8-hydroxy-2'-deoxyguanosine DNA binding / telomeric D-loop binding / telomerase catalytic core complex / regulation of double-strand break repair via nonhomologous end joining / RNA-templated DNA biosynthetic process / telomerase inhibitor activity / DEAD/H-box RNA helicase binding / establishment of protein localization to telomere / telomeric D-loop disassembly / shelterin complex / Telomere C-strand synthesis initiation / regulation of telomere maintenance via telomerase / Regulation of MITF-M-dependent genes involved in DNA replication, damage repair and senescence / Telomere C-strand (Lagging Strand) Synthesis / single-stranded telomeric DNA binding / nuclear telomere cap complex / siRNA processing / telomere maintenance via recombination / G-rich strand telomeric DNA binding / telomere capping / Processive synthesis on the C-strand of the telomere / positive regulation of vascular associated smooth muscle cell migration / Polymerase switching on the C-strand of the telomere / Removal of the Flap Intermediate from the C-strand / telomerase RNA binding / telomerase holoenzyme complex / RNA-templated transcription / telomeric DNA binding / DNA biosynthetic process / positive regulation of stem cell proliferation / negative regulation of telomere maintenance via telomerase / positive regulation of telomere maintenance / mitochondrial nucleoid / Telomere Extension By Telomerase / negative regulation of cellular senescence / replicative senescence / positive regulation of Wnt signaling pathway / negative regulation of extrinsic apoptotic signaling pathway in absence of ligand / positive regulation of G1/S transition of mitotic cell cycle / telomere maintenance via telomerase / RNA-directed DNA polymerase activity / negative regulation of endothelial cell apoptotic process / response to cadmium ion / Packaging Of Telomere Ends / positive regulation of vascular associated smooth muscle cell proliferation / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / positive regulation of telomere maintenance via telomerase / telomere maintenance / Inhibition of DNA recombination at telomere / Meiotic synapsis / positive regulation of nitric-oxide synthase activity / positive regulation of D-glucose import / mitochondrion organization / Formation of the beta-catenin:TCF transactivating complex / transcription coactivator binding / regulation of protein stability / PML body / DNA Damage/Telomere Stress Induced Senescence / positive regulation of miRNA transcription / RNA-directed DNA polymerase / telomerase activity / protein import into nucleus / positive regulation of angiogenesis / structural constituent of chromatin / positive regulation of protein binding / nucleosome / protein-folding chaperone binding / heart development / cellular response to hypoxia / negative regulation of neuron apoptotic process / tRNA binding / chromosome, telomeric region / nuclear body / nuclear speck / protein heterodimerization activity / negative regulation of gene expression / RNA-directed RNA polymerase activity / nucleolus / protein homodimerization activity / DNA binding / RNA binding / nucleoplasm / identical protein binding / metal ion binding 類似検索 - 分子機能
: / Protection of telomeres protein 1 (POT1), C-terminal insertion domain / Shelterin complex subunit TPP1/Est3 / Shelterin complex subunit, TPP1/ACD / Adrenocortical dysplasia protein / : / Telomerase reverse transcriptase, C-terminal extension / Protection of telomeres protein 1, ssDNA-binding domain / ssDNA-binding domain of telomere protection protein / Protection of telomeres protein 1 ...: / Protection of telomeres protein 1 (POT1), C-terminal insertion domain / Shelterin complex subunit TPP1/Est3 / Shelterin complex subunit, TPP1/ACD / Adrenocortical dysplasia protein / : / Telomerase reverse transcriptase, C-terminal extension / Protection of telomeres protein 1, ssDNA-binding domain / ssDNA-binding domain of telomere protection protein / Protection of telomeres protein 1 / Telomerase ribonucleoprotein complex - RNA binding domain / Telomeric single stranded DNA binding POT1/Cdc13 / Telomeric single stranded DNA binding POT1/CDC13 / Telomeric single stranded DNA binding POT1/CDC13 / Telomerase reverse transcriptase / Telomerase ribonucleoprotein complex - RNA-binding domain / Telomerase ribonucleoprotein complex - RNA binding domain / Nucleic acid-binding proteins / : / Histone H2B signature. / Histone H2B / Histone H2B / Histone H2A conserved site / Histone H2A signature. / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone H2A / Histone 2A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 / Reverse transcriptase domain / Reverse transcriptase (RNA-dependent DNA polymerase) / Reverse transcriptase (RT) catalytic domain profile. / Histone-fold / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Nucleic acid-binding, OB-fold / DNA/RNA polymerase superfamily / Beta Barrel / Mainly Beta 類似検索 - ドメイン・相同性
ジャーナル: Science / 年: 2022 タイトル: Structural basis of human telomerase recruitment by TPP1-POT1. 著者: Zala Sekne / George E Ghanim / Anne-Marie M van Roon / Thi Hoang Duong Nguyen / 要旨: Telomerase maintains genome stability by extending the 3' telomeric repeats at eukaryotic chromosome ends, thereby counterbalancing progressive loss caused by incomplete genome replication. In ...Telomerase maintains genome stability by extending the 3' telomeric repeats at eukaryotic chromosome ends, thereby counterbalancing progressive loss caused by incomplete genome replication. In mammals, telomerase recruitment to telomeres is mediated by TPP1, which assembles as a heterodimer with POT1. We report structures of DNA-bound telomerase in complex with TPP1 and with TPP1-POT1 at 3.2- and 3.9-angstrom resolution, respectively. Our structures define interactions between telomerase and TPP1-POT1 that are crucial for telomerase recruitment to telomeres. The presence of TPP1-POT1 stabilizes the DNA, revealing an unexpected path by which DNA exits the telomerase active site and a DNA anchor site on telomerase that is important for telomerase processivity. Our findings rationalize extensive prior genetic and biochemical findings and provide a framework for future mechanistic work on telomerase regulation.
平均露光時間: 3 sec. / 電子線照射量: 48 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 撮影したグリッド数: 3 / 実像数: 50775 詳細: Images were collected in movie-mode and fractionated into 48 movie frames
電子光学装置
エネルギーフィルター名称: GIF Quantum LS / エネルギーフィルタースリット幅: 20 eV
画像スキャン
横: 5760 / 縦: 4092
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解析
ソフトウェア
名称: REFMAC / バージョン: 5.8.0256 / 分類: 精密化
EMソフトウェア
ID
名称
バージョン
カテゴリ
1
RELION
4
粒子像選択
2
EPU
2.13.0.3175REL
画像取得
4
CTFFIND
4
CTF補正
7
UCSF ChimeraX
モデルフィッティング
8
UCSF Chimera
モデルフィッティング
9
Coot
モデルフィッティング
11
RELION
4
初期オイラー角割当
12
RELION
4
最終オイラー角割当
13
RELION
4
分類
14
RELION
4
3次元再構成
15
REFMAC
5.8
モデル精密化
CTF補正
タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION
粒子像の選択
選択した粒子像数: 21589656
対称性
点対称性: C1 (非対称)
3次元再構成
解像度: 3.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 192871 / クラス平均像の数: 1 / 対称性のタイプ: POINT
原子モデル構築
プロトコル: AB INITIO MODEL / 空間: RECIPROCAL
原子モデル構築
3D fitting-ID: 1 / Source name: PDB / タイプ: experimental model
解像度: 3.9→3.9 Å / Cor.coef. Fo:Fc: 0.966 / SU B: 85.016 / SU ML: 1.002 / ESU R: 0.973 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Rwork
0.32344
-
-
obs
0.32344
102581
100 %
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK